Trotte-menu et le mystrère de la carpe jaune

Once again, a terrible threat hangs over the Potager-du-vieux-Moulin-de-la-Rivière-Courante: the Rats and their leader, the cruel Morcifer, are back and have stolen the black heart that grants them power and invincibility... But since this black heart that bewitches all the peaceful residents of the Kitchen Garden has no power over Mice, Trotte-Menu, the bravest of them all, sets off to retrieve this evil object with the help of Agathe, the gossiping thieving magpie, and Tryphon Hedgehog, the short-tempered reporter who has an annoying habit of curling into a ball...

It is from the Old Willow, one of the seven Sages of the Great Forest, that the three friends will gather precious information. Will the Rats succeed in extending their power over the Kitchen Garden? Certainly not if the children assist Trotte-Menu in casting the black heart into the Grand Pool where Adelaïde, the Yellow Carp and fifth Sage to the right of the Great Horned Owl, keeps watch...